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Pablo Picasso seated at a table with many of his paintings. Photo: Gjon Mili/The LIFE Picture Collection/Getty Images

Researchers using x-ray technology discovered hidden artwork beneath one of Pablo Picasso's Blue Period paintings, National Geographic reports. The 1902 painting La Misereuse Accroupie (The Crouching Beggar) analyzed by a team of researchers from U.S. and Canada revealed Picasso painted over a landscape portrait by an unknown artist.

Flashback: In 1957, Picasso said that x-ray technology might be used to reveal a hidden work in one of his earliest paintings.

The technique, called x-ray fluorescent spectroscopy, showed Picasso rotated the artwork of a Barcelona painter 90 degrees to be able to use the lines of the landscape form to create his final composition.

Why it matters: "[W]e can get into the mind of the artist and better understand the creative process," said Marc Walton, a research professor of materials science and engineering at Northwestern University.

One curious finding the researchers discovered is "the unexpected presence of an awkwardly positioned hand holding a disc," NatGeo writes. "We can see that he was wiping off the paint and working to position the fingers,” Walton, who helped develop the x-ray tool, told NatGeo.

Go deeper: Lost Artwork Found Under Famous Picasso Painting

Go deeper

Updated 2 hours ago - Politics & Policy

White House stands by imperiled Tanden nomination after Senate panel postpones hearing

Neera Tanden. Photo: Anna Moneymaker/The New York Times/Bloomberg via Getty Images

The Senate Homeland Security Committee is postponing a confirmation hearing scheduled Wednesday for Neera Tanden, Axios has learned, a potential death knell for President Biden's nominee to lead the Office of Management and Budget.

The latest: Asked Wednesday afternoon whether Tanden has offered to withdraw her nomination, Psaki told reporters, "That’s not the stage we’re in." She noted that it's a "numbers game" and a "matter of getting one Republican" to support the nomination.

Acting Capitol Police chief: Officers were unsure of lethal force rules on Jan. 6

Photo: Chip Somodevilla/Getty Images

Acting U.S. Capitol Police Chief Yogananda Pittman wrote in prepared remarks for a House hearing on Thursday that officers in her department were "unsure of when to use lethal force" during the Jan. 6 insurrection.

Why it matters: Capitol Police did deploy lethal force on Jan. 6 — shooting and killing 35-year-old Ashli Babbit — but have faced questions over why officers appeared to be less forceful against pro-Trump rioters than participants in previous demonstrations, including those over Black Lives Matter and now-Supreme Court Justice Brett Kavanaugh.

United CEO is confident people will feel safe traveling again by 2022

Axios' Joann Muller and United CEO Scott Kirby. Photo: Axios

United Airlines CEO Scott Kirby believes that people will feel safe traveling again by this time next year, depending on the pace of vaccinations and the government's ongoing response to the pandemic, he said at an Axios virtual event.

Why it matters: Misery for global aviation is likely to continue and hold back a broader economic recovery if nothing changes, especially with new restrictions on international border crossings. U.S. airlines carried about 60% fewer passengers in 2020 compared with 2019.